cnvd - cnvd-2020-49538

cnvd-2020-49538

Vulnerability from cnvd

Title: Contiki-NG缓冲区溢出漏洞（CNVD-2020-49538）

Description:

Contiki-NG是一套用于下一代IoT（物联网）设备的开源跨平台操作系统。

Contiki-NG 4.4版本至4.5版本（SNMP代理）中存在缓冲区溢出漏洞。该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。

Severity: 高

Patch Name: Contiki-NG缓冲区溢出漏洞（CNVD-2020-49538）的补丁

Patch Description:

Contiki-NG是一套用于下一代IoT（物联网）设备的开源跨平台操作系统。

Contiki-NG 4.4版本至4.5版本（SNMP代理）中存在缓冲区溢出漏洞。该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/mjurczak/contiki-ng/tree/bugfix/snmp-engine

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-14936

Impacted products

Name
Contiki-NG Contiki-NG >=4.4，<=4.5

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-14936",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-14936"
    }
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-49538",
  "openTime": "2020-08-26",
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  "patchName": "Contiki-NG\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-49538\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Contiki-NG Contiki-NG \u003e=4.4\uff0c\u003c=4.5"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-14936",
  "serverity": "\u9ad8",
  "submitTime": "2020-08-19",
  "title": "Contiki-NG\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-49538\uff09"
}

CVE-2020-14936 (GCVE-0-2020-14936)

Vulnerability from cvelistv5

Published

2020-08-18 16:35

Modified

2024-08-04 13:00

Severity ?

CWE

Summary

Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP agent. Functions parsing the OIDs in SNMP requests lack sufficient allocated target-buffer capacity verification when writing parsed OID values. The function snmp_oid_decode_oid() may overwrite memory areas beyond the provided target buffer, when called from snmp_message_decode() upon an SNMP request reception. Because the content of the write operations is externally provided in the SNMP requests, it enables a remote overwrite of an IoT device's memory regions beyond the allocated buffer. This overflow may allow remote overwrite of stack and statically allocated variables memory regions by sending a crafted SNMP request.

References

▼	URL	Tags
	https://drive.google.com/file/d/1FypWH_g475jSL0mDFzquaATCeRIHQ2kj/view?usp=sharing	x_refsource_MISC
	https://github.com/contiki-ng/contiki-ng/issues/1351	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

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{
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          },
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            "url": "https://github.com/contiki-ng/contiki-ng/issues/1351"
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        }
      ],
      "problemTypes": [
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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